1: #!/usr/bin/perl
2: # The LearningOnline Network
3: # lond "LON Daemon" Server (port "LOND" 5663)
4: # 5/26/99,6/4,6/10,6/11,6/14,6/15,6/26,6/28,6/30,
5: # 7/8,7/9,7/10,7/12,7/17,7/19,9/21,
6: # 10/7,10/8,10/9,10/11,10/13,10/15 Gerd Kortemeyer
7: # based on "Perl Cookbook" ISBN 1-56592-243-3
8: # preforker - server who forks first
9: # runs as a daemon
10: # HUPs
11: # uses IDEA encryption
12:
13: use IO::Socket;
14: use IO::File;
15: use Apache::File;
16: use Symbol;
17: use POSIX;
18: use Crypt::IDEA;
19: use LWP::UserAgent();
20: use GDBM_File;
21: use Authen::Krb4;
22:
23: # ------------------------------------ Read httpd access.conf and get variables
24:
25: open (CONFIG,"/etc/httpd/conf/access.conf") || die "Can't read access.conf";
26:
27: while ($configline=<CONFIG>) {
28: if ($configline =~ /PerlSetVar/) {
29: my ($dummy,$varname,$varvalue)=split(/\s+/,$configline);
30: $perlvar{$varname}=$varvalue;
31: }
32: }
33: close(CONFIG);
34:
35: $PREFORK=4; # number of children to maintain, at least four spare
36:
37: # ------------------------------------------------------------- Read hosts file
38:
39: open (CONFIG,"$perlvar{'lonTabDir'}/hosts.tab") || die "Can't read host file";
40:
41: while ($configline=<CONFIG>) {
42: my ($id,$domain,$role,$name,$ip)=split(/:/,$configline);
43: chomp($ip);
44: $hostid{$ip}=$id;
45: if ($id eq $perlvar{'lonHostID'}) { $thisserver=$name; }
46: $PREFORK++;
47: }
48: close(CONFIG);
49:
50: # establish SERVER socket, bind and listen.
51: $server = IO::Socket::INET->new(LocalPort => $perlvar{'londPort'},
52: Type => SOCK_STREAM,
53: Proto => 'tcp',
54: Reuse => 1,
55: Listen => 10 )
56: or die "making socket: $@\n";
57:
58: # --------------------------------------------------------- Do global variables
59:
60: # global variables
61:
62: $MAX_CLIENTS_PER_CHILD = 5; # number of clients each child should
63: # process
64: %children = (); # keys are current child process IDs
65: $children = 0; # current number of children
66:
67: sub REAPER { # takes care of dead children
68: $SIG{CHLD} = \&REAPER;
69: my $pid = wait;
70: $children --;
71: &logthis("Child $pid died");
72: delete $children{$pid};
73: }
74:
75: sub HUNTSMAN { # signal handler for SIGINT
76: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
77: kill 'INT' => keys %children;
78: my $execdir=$perlvar{'lonDaemons'};
79: unlink("$execdir/logs/lond.pid");
80: &logthis("Shutting down");
81: exit; # clean up with dignity
82: }
83:
84: sub HUPSMAN { # signal handler for SIGHUP
85: local($SIG{CHLD}) = 'IGNORE'; # we're going to kill our children
86: kill 'INT' => keys %children;
87: close($server); # free up socket
88: &logthis("Restarting");
89: my $execdir=$perlvar{'lonDaemons'};
90: exec("$execdir/lond"); # here we go again
91: }
92:
93: # --------------------------------------------------------------------- Logging
94:
95: sub logthis {
96: my $message=shift;
97: my $execdir=$perlvar{'lonDaemons'};
98: my $fh=IO::File->new(">>$execdir/logs/lond.log");
99: my $now=time;
100: my $local=localtime($now);
101: print $fh "$local ($$): $message\n";
102: }
103:
104: # ----------------------------------------------------------- Send USR1 to lonc
105:
106: sub reconlonc {
107: my $peerfile=shift;
108: &logthis("Trying to reconnect for $peerfile");
109: my $loncfile="$perlvar{'lonDaemons'}/logs/lonc.pid";
110: if (my $fh=IO::File->new("$loncfile")) {
111: my $loncpid=<$fh>;
112: chomp($loncpid);
113: if (kill 0 => $loncpid) {
114: &logthis("lonc at pid $loncpid responding, sending USR1");
115: kill USR1 => $loncpid;
116: sleep 1;
117: if (-e "$peerfile") { return; }
118: &logthis("$peerfile still not there, give it another try");
119: sleep 5;
120: if (-e "$peerfile") { return; }
121: &logthis("$peerfile still not there, giving up");
122: } else {
123: &logthis("lonc at pid $loncpid not responding, giving up");
124: }
125: } else {
126: &logthis('lonc not running, giving up');
127: }
128: }
129:
130: # -------------------------------------------------- Non-critical communication
131: sub subreply {
132: my ($cmd,$server)=@_;
133: my $peerfile="$perlvar{'lonSockDir'}/$server";
134: my $sclient=IO::Socket::UNIX->new(Peer =>"$peerfile",
135: Type => SOCK_STREAM,
136: Timeout => 10)
137: or return "con_lost";
138: print $sclient "$cmd\n";
139: my $answer=<$sclient>;
140: chomp($answer);
141: if (!$answer) { $answer="con_lost"; }
142: return $answer;
143: }
144:
145: sub reply {
146: my ($cmd,$server)=@_;
147: my $answer;
148: if ($server ne $perlvar{'lonHostID'}) {
149: $answer=subreply($cmd,$server);
150: if ($answer eq 'con_lost') {
151: $answer=subreply("ping",$server);
152: if ($answer ne $server) {
153: &reconlonc("$perlvar{'lonSockDir'}/$server");
154: }
155: $answer=subreply($cmd,$server);
156: }
157: } else {
158: $answer='self_reply';
159: }
160: return $answer;
161: }
162:
163: # -------------------------------------------- Return path to profile directory
164: sub propath {
165: my ($udom,$uname)=@_;
166: $udom=~s/\W//g;
167: $uname=~s/\W//g;
168: my $subdir=$uname;
169: $subdir =~ s/(.)(.)(.).*/$1\/$2\/$3/;
170: my $proname="$perlvar{'lonUsersDir'}/$udom/$subdir/$uname";
171: return $proname;
172: }
173:
174: # --------------------------------------- Is this the home server of an author?
175: sub ishome {
176: my $author=shift;
177: $author=~s/\/home\/httpd\/html\/res\/([^\/]*)\/([^\/]*).*/$1\/$2/;
178: my ($udom,$uname)=split(/\//,$author);
179: my $proname=propath($udom,$uname);
180: if (-e $proname) {
181: return 'owner';
182: } else {
183: return 'not_owner';
184: }
185: }
186:
187: # ======================================================= Continue main program
188: # ---------------------------------------------------- Fork once and dissociate
189:
190: $fpid=fork;
191: exit if $fpid;
192: die "Couldn't fork: $!" unless defined ($fpid);
193:
194: POSIX::setsid() or die "Can't start new session: $!";
195:
196: # ------------------------------------------------------- Write our PID on disk
197:
198: $execdir=$perlvar{'lonDaemons'};
199: open (PIDSAVE,">$execdir/logs/lond.pid");
200: print PIDSAVE "$$\n";
201: close(PIDSAVE);
202: &logthis("Starting");
203:
204: # ------------------------------------------------------- Now we are on our own
205:
206: # Fork off our children.
207: for (1 .. $PREFORK) {
208: make_new_child();
209: }
210:
211: # ----------------------------------------------------- Install signal handlers
212:
213: $SIG{CHLD} = \&REAPER;
214: $SIG{INT} = $SIG{TERM} = \&HUNTSMAN;
215: $SIG{HUP} = \&HUPSMAN;
216:
217: # And maintain the population.
218: while (1) {
219: sleep; # wait for a signal (i.e., child's death)
220: for ($i = $children; $i < $PREFORK; $i++) {
221: make_new_child(); # top up the child pool
222: }
223: }
224:
225: sub make_new_child {
226: my $pid;
227: my $cipher;
228: my $sigset;
229: &logthis("Attempting to start child");
230: # block signal for fork
231: $sigset = POSIX::SigSet->new(SIGINT);
232: sigprocmask(SIG_BLOCK, $sigset)
233: or die "Can't block SIGINT for fork: $!\n";
234:
235: die "fork: $!" unless defined ($pid = fork);
236:
237: if ($pid) {
238: # Parent records the child's birth and returns.
239: sigprocmask(SIG_UNBLOCK, $sigset)
240: or die "Can't unblock SIGINT for fork: $!\n";
241: $children{$pid} = 1;
242: $children++;
243: return;
244: } else {
245: # Child can *not* return from this subroutine.
246: $SIG{INT} = 'DEFAULT'; # make SIGINT kill us as it did before
247:
248: # unblock signals
249: sigprocmask(SIG_UNBLOCK, $sigset)
250: or die "Can't unblock SIGINT for fork: $!\n";
251:
252: # handle connections until we've reached $MAX_CLIENTS_PER_CHILD
253: for ($i=0; $i < $MAX_CLIENTS_PER_CHILD; $i++) {
254: $client = $server->accept() or last;
255:
256: # =============================================================================
257: # do something with the connection
258: # -----------------------------------------------------------------------------
259: # see if we know client and check for spoof IP by challenge
260: my $caller=getpeername($client);
261: my ($port,$iaddr)=unpack_sockaddr_in($caller);
262: my $clientip=inet_ntoa($iaddr);
263: my $clientrec=($hostid{$clientip} ne undef);
264: &logthis("Connect from $clientip ($hostid{$clientip})");
265: my $clientok;
266: if ($clientrec) {
267: my $remotereq=<$client>;
268: $remotereq=~s/\W//g;
269: if ($remotereq eq 'init') {
270: my $challenge="$$".time;
271: print $client "$challenge\n";
272: $remotereq=<$client>;
273: $remotereq=~s/\W//g;
274: if ($challenge eq $remotereq) {
275: $clientok=1;
276: print $client "ok\n";
277: } else {
278: &logthis("$clientip did not reply challenge");
279: }
280: } else {
281: &logthis("$clientip failed to initialize: >$remotereq<");
282: }
283: } else {
284: &logthis("Unknown client $clientip");
285: }
286: if ($clientok) {
287: # ---------------- New known client connecting, could mean machine online again
288: &reconlonc("$perlvar{'lonSockDir'}/$hostid{$clientip}");
289: # ------------------------------------------------------------ Process requests
290: while (my $userinput=<$client>) {
291: chomp($userinput);
292: my $wasenc=0;
293: # ------------------------------------------------------------ See if encrypted
294: if ($userinput =~ /^enc/) {
295: if ($cipher) {
296: my ($cmd,$cmdlength,$encinput)=split(/:/,$userinput);
297: $userinput='';
298: for (my $encidx=0;$encidx<length($encinput);$encidx+=16) {
299: $userinput.=
300: $cipher->decrypt(
301: pack("H16",substr($encinput,$encidx,16))
302: );
303: }
304: $userinput=substr($userinput,0,$cmdlength);
305: $wasenc=1;
306: }
307: }
308: # ------------------------------------------------------------- Normal commands
309: # ------------------------------------------------------------------------ ping
310: if ($userinput =~ /^ping/) {
311: print $client "$perlvar{'lonHostID'}\n";
312: # ------------------------------------------------------------------------ pong
313: } elsif ($userinput =~ /^pong/) {
314: $reply=reply("ping",$hostid{$clientip});
315: print $client "$perlvar{'lonHostID'}:$reply\n";
316: # ------------------------------------------------------------------------ ekey
317: } elsif ($userinput =~ /^ekey/) {
318: my $buildkey=time.$$.int(rand 100000);
319: $buildkey=~tr/1-6/A-F/;
320: $buildkey=int(rand 100000).$buildkey.int(rand 100000);
321: my $key=$perlvar{'lonHostID'}.$hostid{$clientip};
322: $key=~tr/a-z/A-Z/;
323: $key=~tr/G-P/0-9/;
324: $key=~tr/Q-Z/0-9/;
325: $key=$key.$buildkey.$key.$buildkey.$key.$buildkey;
326: $key=substr($key,0,32);
327: my $cipherkey=pack("H32",$key);
328: $cipher=new IDEA $cipherkey;
329: print $client "$buildkey\n";
330: # ------------------------------------------------------------------------ load
331: } elsif ($userinput =~ /^load/) {
332: my $loadavg;
333: {
334: my $loadfile=IO::File->new('/proc/loadavg');
335: $loadavg=<$loadfile>;
336: }
337: $loadavg =~ s/\s.*//g;
338: my $loadpercent=100*$loadavg/$perlvar{'lonLoadLim'};
339: print $client "$loadpercent\n";
340: # ------------------------------------------------------------------------ auth
341: } elsif ($userinput =~ /^auth/) {
342: if ($wasenc==1) {
343: my ($cmd,$udom,$uname,$upass)=split(/:/,$userinput);
344: chomp($upass);
345: my $proname=propath($udom,$uname);
346: my $passfilename="$proname/passwd";
347: if (-e $passfilename) {
348: my $pf = IO::File->new($passfilename);
349: my $realpasswd=<$pf>;
350: chomp($realpasswd);
351: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
352: my $pwdcorrect=0;
353: if ($howpwd eq 'internal') {
354: $pwdcorrect=
355: (crypt($upass,$contentpwd) eq $contentpwd);
356: } elsif ($howpwd eq 'unix') {
357: $contentpwd=(getpwnam($uname))[1];
358: $pwdcorrect=
359: (crypt($upass,$contentpwd) eq $contentpwd);
360: } elsif ($howpwd eq 'krb4') {
361: $pwdcorrect=(
362: Authen::Krb4::get_pw_in_tkt($uname,"",
363: $contentpwd,'krbtgt',$contentpwd,1,
364: $upass) == 0);
365: }
366: if ($pwdcorrect) {
367: print $client "authorized\n";
368: } else {
369: print $client "non_authorized\n";
370: }
371: } else {
372: print $client "unknown_user\n";
373: }
374: } else {
375: print $client "refused\n";
376: }
377: # ---------------------------------------------------------------------- passwd
378: } elsif ($userinput =~ /^passwd/) {
379: if ($wasenc==1) {
380: my
381: ($cmd,$udom,$uname,$upass,$npass)=split(/:/,$userinput);
382: chomp($npass);
383: my $proname=propath($udom,$uname);
384: my $passfilename="$proname/passwd";
385: if (-e $passfilename) {
386: my $realpasswd;
387: { my $pf = IO::File->new($passfilename);
388: $realpasswd=<$pf>; }
389: chomp($realpasswd);
390: my ($howpwd,$contentpwd)=split(/:/,$realpasswd);
391: if ($howpwd eq 'internal') {
392: if (crypt($upass,$contentpwd) eq $contentpwd) {
393: my $salt=time;
394: $salt=substr($salt,6,2);
395: my $ncpass=crypt($npass,$salt);
396: { my $pf = IO::File->new(">$passfilename");
397: print $pf "internal:$ncpass\n";; }
398: print $client "ok\n";
399: } else {
400: print $client "non_authorized\n";
401: }
402: } else {
403: print $client "auth_mode_error\n";
404: }
405: } else {
406: print $client "unknown_user\n";
407: }
408: } else {
409: print $client "refused\n";
410: }
411: # ------------------------------------------------------------------------ home
412: } elsif ($userinput =~ /^home/) {
413: my ($cmd,$udom,$uname)=split(/:/,$userinput);
414: chomp($uname);
415: my $proname=propath($udom,$uname);
416: if (-e $proname) {
417: print $client "found\n";
418: } else {
419: print $client "not_found\n";
420: }
421: # ---------------------------------------------------------------------- update
422: } elsif ($userinput =~ /^update/) {
423: my ($cmd,$fname)=split(/:/,$userinput);
424: my $ownership=ishome($fname);
425: if ($ownership eq 'not_owner') {
426: if (-e $fname) {
427: my ($dev,$ino,$mode,$nlink,
428: $uid,$gid,$rdev,$size,
429: $atime,$mtime,$ctime,
430: $blksize,$blocks)=stat($fname);
431: $now=time;
432: $since=$now-$atime;
433: if ($since>$perlvar{'lonExpire'}) {
434: $reply=
435: reply("unsub:$fname","$hostid{$clientip}");
436: unlink("$fname");
437: } else {
438: my $transname="$fname.in.transfer";
439: my $remoteurl=
440: reply("sub:$fname","$hostid{$clientip}");
441: my $response;
442: {
443: my $ua=new LWP::UserAgent;
444: my $request=new HTTP::Request('GET',"$remoteurl");
445: $response=$ua->request($request,$transname);
446: }
447: if ($response->is_error()) {
448: unline($transname);
449: my $message=$response->status_line;
450: &logthis(
451: "LWP GET: $message for $fname ($remoteurl)");
452: } else {
453: rename($transname,$fname);
454: }
455: }
456: print $client "ok\n";
457: } else {
458: print $client "not_found\n";
459: }
460: } else {
461: print $client "rejected\n";
462: }
463: # ----------------------------------------------------------------- unsubscribe
464: } elsif ($userinput =~ /^unsub/) {
465: my ($cmd,$fname)=split(/:/,$userinput);
466: if (-e $fname) {
467: if (unlink("$fname.$hostid{$clientip}")) {
468: print $client "ok\n";
469: } else {
470: print $client "not_subscribed\n";
471: }
472: } else {
473: print $client "not_found\n";
474: }
475: # ------------------------------------------------------------------- subscribe
476: } elsif ($userinput =~ /^sub/) {
477: my ($cmd,$fname)=split(/:/,$userinput);
478: my $ownership=ishome($fname);
479: if ($ownership eq 'owner') {
480: if (-e $fname) {
481: $now=time;
482: {
483: my $sh=IO::File->new(">$fname.$hostid{$clientip}");
484: print $sh "$clientip:$now\n";
485: }
486: $fname=~s/\/home\/httpd\/html\/res/raw/;
487: $fname="http://$thisserver/".$fname;
488: print $client "$fname\n";
489: } else {
490: print $client "not_found\n";
491: }
492: } else {
493: print $client "rejected\n";
494: }
495: # ------------------------------------------------------------------------- put
496: } elsif ($userinput =~ /^put/) {
497: my ($cmd,$udom,$uname,$namespace,$what)
498: =split(/:/,$userinput);
499: $namespace=~s/\W//g;
500: chomp($what);
501: my $proname=propath($udom,$uname);
502: my $now=time;
503: {
504: my $hfh;
505: if (
506: $hfh=IO::File->new(">>$proname/$namespace.hist")
507: ) { print $hfh "P:$now:$what\n"; }
508: }
509: my @pairs=split(/\&/,$what);
510: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
511: foreach $pair (@pairs) {
512: ($key,$value)=split(/=/,$pair);
513: $hash{$key}=$value;
514: }
515: if (dbmclose(%hash)) {
516: print $client "ok\n";
517: } else {
518: print $client "error:$!\n";
519: }
520: } else {
521: print $client "error:$!\n";
522: }
523: # ------------------------------------------------------------------------- get
524: } elsif ($userinput =~ /^get/) {
525: my ($cmd,$udom,$uname,$namespace,$what)
526: =split(/:/,$userinput);
527: $namespace=~s/\W//g;
528: chomp($what);
529: my @queries=split(/\&/,$what);
530: my $proname=propath($udom,$uname);
531: my $qresult='';
532: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
533: for ($i=0;$i<=$#queries;$i++) {
534: $qresult.="$hash{$queries[$i]}&";
535: }
536: if (dbmclose(%hash)) {
537: $qresult=~s/\&$//;
538: print $client "$qresult\n";
539: } else {
540: print $client "error:$!\n";
541: }
542: } else {
543: print $client "error:$!\n";
544: }
545: # ------------------------------------------------------------------------ eget
546: } elsif ($userinput =~ /^eget/) {
547: my ($cmd,$udom,$uname,$namespace,$what)
548: =split(/:/,$userinput);
549: $namespace=~s/\W//g;
550: chomp($what);
551: my @queries=split(/\&/,$what);
552: my $proname=propath($udom,$uname);
553: my $qresult='';
554: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
555: for ($i=0;$i<=$#queries;$i++) {
556: $qresult.="$hash{$queries[$i]}&";
557: }
558: if (dbmclose(%hash)) {
559: $qresult=~s/\&$//;
560: if ($cipher) {
561: my $cmdlength=length($qresult);
562: $qresult.=" ";
563: my $encqresult='';
564: for
565: (my $encidx=0;$encidx<=$cmdlength;$encidx+=8) {
566: $encqresult.=
567: unpack("H16",
568: $cipher->encrypt(substr($qresult,$encidx,8)));
569: }
570: print $client "enc:$cmdlength:$encqresult\n";
571: } else {
572: print $client "error:no_key\n";
573: }
574: } else {
575: print $client "error:$!\n";
576: }
577: } else {
578: print $client "error:$!\n";
579: }
580: # ------------------------------------------------------------------------- del
581: } elsif ($userinput =~ /^del/) {
582: my ($cmd,$udom,$uname,$namespace,$what)
583: =split(/:/,$userinput);
584: $namespace=~s/\W//g;
585: chomp($what);
586: my $proname=propath($udom,$uname);
587: my $now=time;
588: {
589: my $hfh;
590: if (
591: $hfh=IO::File->new(">>$proname/$namespace.hist")
592: ) { print $hfh "D:$now:$what\n"; }
593: }
594: my @keys=split(/\&/,$what);
595: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
596: foreach $key (@keys) {
597: delete($hash{$key});
598: }
599: if (dbmclose(%hash)) {
600: print $client "ok\n";
601: } else {
602: print $client "error:$!\n";
603: }
604: } else {
605: print $client "error:$!\n";
606: }
607: # ------------------------------------------------------------------------ keys
608: } elsif ($userinput =~ /^keys/) {
609: my ($cmd,$udom,$uname,$namespace)
610: =split(/:/,$userinput);
611: $namespace=~s/\W//g;
612: chomp($namespace);
613: my $proname=propath($udom,$uname);
614: my $qresult='';
615: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
616: foreach $key (keys %hash) {
617: $qresult.="$key&";
618: }
619: if (dbmclose(%hash)) {
620: $qresult=~s/\&$//;
621: print $client "$qresult\n";
622: } else {
623: print $client "error:$!\n";
624: }
625: } else {
626: print $client "error:$!\n";
627: }
628: # ------------------------------------------------------------------------ dump
629: } elsif ($userinput =~ /^dump/) {
630: my ($cmd,$udom,$uname,$namespace)
631: =split(/:/,$userinput);
632: $namespace=~s/\W//g;
633: chomp($namespace);
634: my $proname=propath($udom,$uname);
635: my $qresult='';
636: if (dbmopen(%hash,"$proname/$namespace.db",0644)) {
637: foreach $key (keys %hash) {
638: $qresult.="$key=$hash{$key}&";
639: }
640: if (dbmclose(%hash)) {
641: $qresult=~s/\&$//;
642: print $client "$qresult\n";
643: } else {
644: print $client "error:$!\n";
645: }
646: } else {
647: print $client "error:$!\n";
648: }
649: # ----------------------------------------------------------------------- idput
650: } elsif ($userinput =~ /^idput/) {
651: my ($cmd,$udom,$what)=split(/:/,$userinput);
652: chomp($what);
653: $udom=~s/\W//g;
654: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
655: my $now=time;
656: {
657: my $hfh;
658: if (
659: $hfh=IO::File->new(">>$proname.hist")
660: ) { print $hfh "P:$now:$what\n"; }
661: }
662: my @pairs=split(/\&/,$what);
663: if (dbmopen(%hash,"$proname.db",0644)) {
664: foreach $pair (@pairs) {
665: ($key,$value)=split(/=/,$pair);
666: $hash{$key}=$value;
667: }
668: if (dbmclose(%hash)) {
669: print $client "ok\n";
670: } else {
671: print $client "error:$!\n";
672: }
673: } else {
674: print $client "error:$!\n";
675: }
676: # ----------------------------------------------------------------------- idget
677: } elsif ($userinput =~ /^idget/) {
678: my ($cmd,$udom,$what)=split(/:/,$userinput);
679: chomp($what);
680: $udom=~s/\W//g;
681: my $proname="$perlvar{'lonUsersDir'}/$udom/ids";
682: my @queries=split(/\&/,$what);
683: my $qresult='';
684: if (dbmopen(%hash,"$proname.db",0644)) {
685: for ($i=0;$i<=$#queries;$i++) {
686: $qresult.="$hash{$queries[$i]}&";
687: }
688: if (dbmclose(%hash)) {
689: $qresult=~s/\&$//;
690: print $client "$qresult\n";
691: } else {
692: print $client "error:$!\n";
693: }
694: } else {
695: print $client "error:$!\n";
696: }
697: # ------------------------------------------------------------- unknown command
698: } else {
699: # unknown command
700: print $client "unknown_cmd\n";
701: }
702: # ------------------------------------------------------ client unknown, refuse
703: }
704: } else {
705: print $client "refused\n";
706: &logthis("Rejected client $clientip, closing connection");
707: }
708: &logthis("Disconnect from $clientip ($hostid{$clientip})");
709: # =============================================================================
710: }
711:
712: # tidy up gracefully and finish
713:
714: # this exit is VERY important, otherwise the child will become
715: # a producer of more and more children, forking yourself into
716: # process death.
717: exit;
718: }
719: }
720:
721:
722:
723:
724:
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